The book was written for young people. For the most part the characters are flat & one-dimensional-- the good are all good & the bad are really bad. As the book was first published in 1809, I was interested in it as an example of the early development of the historic novel. The story based on the author's memories of stories told to her in childhood. It must be taken in that spirit because there is a great deal of divergence from the historic events-- ex, Robert Bruce became a leader of Scotland well before the demise of William Wallace. (Look for reputable sites, not something based on Braveheart--ex. see BBC bios of Bruce
The quality of reading varies with some sections quite good. Kudos for the effort in covering such a long book.